Improvement in propulsion of canal-boats



CORNELIUS 'SVcHiLLlNQ improvement in yPropulsion ofCanal Boats.A

UNITED STATES CORNELIUS SOHILLING, OF NEW YORK, N. Y.

IMPROVEMENT IN PROPULSION OF CANAL-BOATS.

Specification forming part of Letters Patent N o. 119,792, dated October10, 1871.

To all whom it may concern:

Be it known that I, CORNELIUS SCHILLING, of the city, county, and Stateof New York, have invented a new and Improved Propellin g Apparatus 5and I do hereby declare the following' to be a full, clear, and exactdescription thereof, which will enable those skilled in the art to makeand use the same, reference being had to the accompanying drawingforming part of this specifica tion, in which drawing- Figure 1represents a plan or top view of this invention. Fig. 2 is a sectionalside view of the same.

Similar letters indicate corresponding parts.

This invention relates to an improvement on a propelling` apparatus forwhich a patent was granted to me August 14, 1870, No. 106,512, whichimprovement consists in the arrangement of one or more additionalpropeller-blades or levers pivoted to the connecting-rod and brace orlink, and runnin g parallel to the lever', carrying the frontpropeller-blade in such a manner that the area of the propelling surfaceis materially increased, while the construction and cost ofthe apparatusremain almost the same as before. By combining two sets ofpropeller-blades withthe same crank-shaft a continuous action of thepropeller is obtained.

In the drawing, A designates a crank-shaft, which has its bearings instandards arising from a platform which is secured in the bottom of theboat or vessel to be propelled. From the same platform also rise twoother standards, b. The crank-shaft A is provided with three cranks-onein the middle, which connects with a steam-engine or other motor, andthe two others at its ends, as shown in Fig. 1. These two cranks areplaced at an angle of one hundred and eighty degrees toward each other,and they connect, by rods c. with levers D D1 D2, to which thepropeller-blades d d1 d2 are attached. The levers D Dl D2 in each setare retained in a position parallel to each other by links or braces'c,which eX- tend from the standards b, and are pivoted to said levers atsome distance from their ends, as shown in Fig. 2.

By connecting the additional levers D1 D2 (one or more) to the link cand rod c the propellerblades are prevented from dropping down into thewater, and their motion is perfectly deiined and under control of therod c, so that when the crank-shaft A is revolved the propeller-bladesare caused to dip down into the water, one behind the other; then theyare carried out below the water-line, so as to produce the desiredpropelling action, and finally they are lifted out of the wateredgewise, or nearly so, thereby avoiding any unnecessary lift of water.

By connecting two or more propeller-blades with the rod c and link e theeffective area of the propeller is increased with but a triiiingaddition to the cost of the apparatus.

The two sets of propeller-blades shown in the dra-wing are so arrangedthat they alternate with each other, one set being in action while theother is carried back through the air, and thereby a continuous actionof the propeller is produced.

I disclaim everything shown and described in my patent No. 106,512, but

What I claim as new, and desire to secure by Letters Patent, is-

The arrangement of two or more propeller-y blades, cl dl d2, said bladesbeing secured to levers D Dl D2, which are pivoted to rods 'c and linkse, in combination with the crank-shaft A, all constructed and operatingsubstantiallyin the manner herein shown and described.

This specification signed by me this 5th day of July, 1871.

CORNELIUS SCHILLING.

Witnesses:

W. HAUFF,

E. F. KASTENHUBER.

